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Ten-man Boro almost plundered a point as they clawed from behind at Derby only to concede last gasp sickener.

They were up against it after Curtis Main got sent off to leave Boro a man down for the second successive away game then Chris Martin put Derby ahead just before the break.

But Boro looked to have salvaged a point on the break after Dean Whitehead stabbed home – only for Connor Sammon to pounce in the 90 minute after poor defending.

Karanka made two changes to the side that beat Bolton on Saturday, Dean Whitehead coming in to midfield for suspended Grant Leadbitter and striker Curtis Main starting up front in place of Mustapha Carayol.

Boro weathered away some insistent early Derby pressure and twice had to scramble away from inside the box after good moves sparked by teenager Hughes.

Boro probed forward themselves on six minutes as a crisp passing move saw Kei Kamara chest a neat ball forward back to Jacob Butterfield but when he dinked a quick return the striker had wandered a fraction offside.

Then on 10 minutes another good move won a corner on the right and the kick was played to the edge of the box for Albert Adomah but his dipping shot towards the far post was headed away by defender Keogh.

Derby pressed on 13 minutes as a high ball was knocked down the inside right channel towards Martin but Ben Gibson twice nodded the ball high in the air then put in a diving header to send it safely back to keeper Shay Given.

Then on 16 minutes Ward whipped in an in-swing cross that forced Given to back-pedal and tip over for a corner that was woefully over-hit .

Three minutes later, an in-swinging corner from Ward on the left found Buxton 10 yards out but he put his looping header over.

Derby almost broke through on 21 minutes as Ward nut-megged Friend but the full-back chased back and put in a challenge on the striker and hauled him down right on the edge of the box but the ref waved play on.

On 23 minutes Curtis Main was booked for a foul on the keeper, having already been spoken to by the ref for his tigerish tackling.

Boro almost broke through on 25 minutes as Dean Whitehead neatly flicked a diagonal ball behind the defence for Kamara to run on to but his first time effort from 20 yards screamed over.

Straight down the other end Derby threatened as Hughes sent Martin weaving into the box but Rhys Williams had tracked his run all the way to put ij a good tackle as he prepared to unload.

Boro went close on 29 minutes as Butterfield chipped a free-kick to the far post and when Friend nodded it back Kamara connected with an acrobatic airborne volley that flew just outside the near post.

Derby threatened on 32 minutes as full-back Forsyth wriggled past Adomah to get down the left to drill in a low cross that Given did well to scoop away and when it fell to Hughes 20 yards out he sent his half-volley high over.

Boro were down to 10 men on 34 minutes as Curtis Main crashed into Buxton to collect his second yellow card.

Boro went close on 40 minutes as a quick Butterfield ball sent Adomah down the right and he cut inside to drill a low angled shot that brought a good save at the near post.

Boro were forced to work hard to keep Derby at bay. The home side almost picked their through on 43 minutes but Wisdom's stabbed effort from the edge of the box was weak and straight into Given's hands.

But Derby snatched the lead seconds into stoppage time as Bryson got down the left and whipped a cross to the near post where CHRIS MARTIN stretch to just get a touch on the ball – there were suggestions of hand-ball - ahead of a brave attempted blocking header by Gibson and it squirted inside the upright.

HALF-TIME: DERBY 1 BORO 0

Boro put Carayol on at the break for Butterfield while Derby put on Hendrick for Eustace.

Derby showed first after the break as a ball from Forsyth found Martin in the crowd and he sent a overhead kick high and wide.

Then Boro won a free-kick as Wisdom fouled Kamara but when it was cleared quickly Derby swarmed forward to swiftly push the ball from right to left before Forsyth sent a 25 yard effort well wide of the far post.

Boro hit back soon after as Friend raced down the left and crossed to the far post for Kamara to send a looping header into the hands of keeper Grant.

Derby went close on 62 minutes when Ward curled in a corner for Buxton to power a header goalwards but alert Kamara was well placed to clear it off the line.

The Rams were using their extra man wisely and pushing the ball out wide to stretch Boro and the pinned down ten men were having to work to resist.

Derby went close on 66 minutes as Dawkins got down the left then crossed to the far side where unmarked Ward leathered a low shot to the near post but Given got down well to save.

But Boro broke out of defence to score a leveller against the run of play on 74 minutes.

Jet heeled Carayol streaked forward and sliced through the defence to get to the box then squared for Smallwood who lost control but the loose ball rolled kindly for DEAN WHITEHEAD to lash in from eight yards.

Derby put Russell of for Dawkins on 76 minutes then Sammon for Bryson on 79 minutes.

Williams was booked on 82 minutes for a foul on Sammon.

On the 87 minute Varga came on for Adomah.

But Derby snatched victory in the last minute as a ball was flicked into the box and was nodded down between Gibson, Williams and Given but CONNOR SAMMON reacted first to bundle it home.